Best Telecom Infrastructure Companies in London, United Kingdom
The 43 best Telecom Infrastructure companies in London, United Kingdom in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: CityFibre.
Ranked: Best Telecom Infrastructure companies in London
| # | Company | Disclosed funding | Last round | Stage | Founder | Founded | Tech stack | Recent signals |
|---|---|---|---|---|---|---|---|---|
| 1 | CityFibre Operator of a wholesale full fibre broadband network 69Funding top 18%Growth top 24%News top 25%Product top 35% All 9 signals ▾Fundingtop 18% Growthtop 24% Newstop 25% Producttop 35% Techtop 38% Moattop 39% Markettop 40% Innovationbottom 44% Globalbottom 39% Funding: Raised $4.5B across 7 rounds · 7 rounds over 14 yrs (0.5/yr) Growth: 4 acquisition/expansion moves in 24 mo · Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 69/100 | $4.5B | 13 mo ago | Acquired | — | 2011 | Craft CMSCart FunctionalityApple iCloud Mail+27 | 1 partnership · 2 awards |
| 2 | Boldyn Networks Provider of shared network infrastructure and connectivity solutions 62Funding top 27%Growth top 29%Fin. health top 34%Tech top 38% All 10 signals ▾Fundingtop 27% Growthtop 29% Fin. healthtop 34% Techtop 38% Newstop 41% Partnerstop 42% Innovationtop 48% Producttop 50% Globalbottom 43% Marketbottom 42% Funding: Raised $1.2B across 1 rounds · 1 rounds over 1 yrs (1.0/yr) Growth: Revenue +202% YoY · 4 acquisition/expansion moves in 24 mo rank vs industry peers · Fliar Intelligence Index 62/100 | $1.2B | 18 mo ago | Funding Raised | — | 2013 | Craft CMSApple iCloud MailPHP+22 | 1 partnership |
| 3 | Helios Towers Operator of mobile tower infrastructure 80News top 21%Fin. health top 25%Market top 29%Growth top 30% All 10 signals ▾Newstop 21% Fin. healthtop 25% Markettop 29% Growthtop 30% Fundingtop 33% Techtop 35% Moattop 45% Globaltop 48% Talentbottom 49% Partnersbottom 35% News: 5 BI events in 12 mo (of 118 tracked, 10 types) · +400% YoY Fin. health: Revenue ~$854M (FY2023) · Net margin 4.6% rank vs industry peers · Fliar Intelligence Index 80/100 | $630M | 145 mo ago | Public | Tom Greenwood Group Chief Executive Officer | 2006 | Node.jsGoogle MapsGSAP+10 | — |
| 4 | IHS Towers Operator of shared communications infrastructure 80Innovation top 20%Market top 23%Product top 26%News top 28% All 10 signals ▾Innovationtop 20% Markettop 23% Producttop 26% Newstop 28% Talenttop 28% Fundingtop 32% Fin. healthtop 32% Globaltop 37% Growthtop 47% Techbottom 40% Innovation: 4 product lines Market: 2,786 employees (top 9% of Telecom) · Revenue ~$2.2B rank vs industry peers · Fliar Intelligence Index 80/100 | $498M | 104 mo ago | Acquired | Mohamad Darwish Co-Founder | 2001 | Adobe Experience ManagerJavaAmazon Web Services+12 | 1 partnership |
| 5 | euNetworks Operator of bandwidth infrastructure and dense fibre networks 32Product top 36%Funding top 39%Tech top 41%Market top 49% All 11 signals ▾Producttop 36% Fundingtop 39% Techtop 41% Markettop 49% Talentbottom 49% Globalbottom 47% Moatbottom 44% Patentsbottom 41% Innovationbottom 40% Newsbottom 35% Growthbottom 22% Product: 2 distinct product lines · Company stage: Acquired Funding: Raised $279M across 2 rounds · 2 rounds over 24 yrs (0.1/yr) rank vs industry peers · Fliar Intelligence Index 32/100 | $279M | 56 mo ago | Acquired | Marisa Trisolino CEO | 2002 | WordPressApple iCloud MailGoogle Workspace+25 | — |
| 6 | Zzoomm Provider of full fibre broadband services 57Growth top 35%Tech top 36%Market top 41%Talent bottom 49% All 7 signals ▾Growthtop 35% Techtop 36% Markettop 41% Talentbottom 49% Fundingbottom 47% Globalbottom 30% Newsbottom 21% Growth: Web rank 5,000,000 → 1,000,000 YoY · 1 acquisition/expansion move in 24 mo Tech: 43 technologies across 6/8 capability areas · Cloud: Amazon Web Services, Cloudflare rank vs industry peers · Fliar Intelligence Index 57/100 | $136M | 58 mo ago | Acquired | James Warner Chief Executive Officer | 2018 | WordPressApple iCloud MailMicrosoft 365+35 | — |
| 7 | Freshwave Provider of wireless connectivity infrastructure and mobile network solutions 27Funding top 49%Tech top 50%Talent bottom 49%Growth bottom 47% All 10 signals ▾Fundingtop 49% Techtop 50% Talentbottom 49% Growthbottom 47% Moatbottom 42% Marketbottom 41% Globalbottom 37% Innovationbottom 30% Patentsbottom 29% Newsbottom 18% Funding: Raised $127M across 1 rounds · 1 rounds over 8 yrs (0.1/yr) Tech: 36 technologies across 4/8 capability areas · Cloud: Cloudflare rank vs industry peers · Fliar Intelligence Index 27/100 | $127M | 20 mo ago | Seed | Simon Frumkin CEO | 2016 | WordPressPleskZoho+32 | 1 launch |
| 8 | XConnect Provider of phone number data and intelligent communication solutions | $34M | 158 mo ago | Acquired | Eli Katz Founder & CEO | 2005 | SwiperPriority HintsImgix+8 | — |
| 9 | Voneus Provider of full fibre and wireless broadband connectivity 50Product top 30%Growth top 35%Innovation top 36%Tech top 40% All 10 signals ▾Producttop 30% Growthtop 35% Innovationtop 36% Techtop 40% Moattop 48% Fundingbottom 48% Talentbottom 45% Marketbottom 38% Globalbottom 37% Newsbottom 27% Product: 4 distinct product lines · Company stage: Series B Growth: Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 50/100 | $32M | 18 mo ago | Series B | Steven Leighton Advisor | 2011 | StatamicPHPLaravel+30 | 1 launch |
| 10 | PacketExchange Provider of refurbished network hardware and networking advice | $14M | 222 mo ago | Acquired | — | 2001 | — | — |
| 11 | RTX Provider of voice, SMS, and call center exchange services | $8M | 111 mo ago | Funding Raised | Phil Tenac Co-Founder | 2007 | — | — |
| 12 | Fast2Fibre Provider of excavation, utilities, and earthworks services | $4M | 93 mo ago | Funding Raised | Tom Fitzherbert Founder & CEO | 2014 | — | — |
Top 12 Telecom Infrastructure companies in London
#1
Acquired · London, England · founded 2011 · 2500 employees$4.5Braised▾
Operator of a wholesale full fibre broadband network. This business manages a fibre infrastructure that provides high speed connectivity services to homes and businesses. The company builds and maintains the underlying network architecture, enabling various service providers to deliver broadband packages to end users.
- Jul 2025Post IPO$674.4M
- Mar 2022Post IPO$395.2M
- Sep 2021Post IPO$1.6B
- Dec 2018Conventional Debt$1.4B
#2
Funding Raised · London, England · founded 2013 · 53 employees$1.2Braised▾
Provider of shared network infrastructure and connectivity solutions. Services include the design, management, and implementation of wireless network systems. The company facilitates connectivity through small cell deployment, private network development, and fiber optic integration. These infrastructure solutions support mobile network coverage and high-performance data transmission across various environments.
- Jan 2025Conventional Debt$1.2B
#3
Seed · London, England · founded 2016 · 127 employees$126.8Mraised▾
Provider of wireless connectivity infrastructure and mobile network solutions. This business delivers wireless technology and network systems to support mobile connectivity. It implements infrastructure to enable communication across various environments.
- Dec 2024Conventional Debt$126.8M
- Aug 2018Seed—
#4
Series B · London, England · founded 2011 · 69 employees$32.4Mraised▾
Provider of full fibre and wireless broadband connectivity. This company delivers internet access through a combination of fibre and wireless technologies to residential and business customers. Services include the installation and maintenance of network infrastructure to facilitate high speed data transmission. The company manages the delivery of broadband packages and provides technical support for connection hardware.
- Jan 2025Series B$7.7M
- Jan 2024Series B$31.7M
- May 2022Series B$3.7M
- Feb 2021Series B$107.9M
#5
Acquired · London, England · founded 2002 · 331 employees$278.9Mraised▾
Operator of bandwidth infrastructure and dense fibre networks. This business provides dark fibre, wavelength, ethernet, and internet connectivity services. It offers colocation, cloud connect, and managed optical solutions to support data transmission and network requirements.
- Dec 2021Conventional Debt$859.4M
- Jun 2020PE$278.9M
- 2002Seed—
#6
Acquired · London, England · founded 2001 · 2786 employees$497.5Mraised▾
Operator of shared communications infrastructure. This business provides towers, distributed antenna systems, small cells, and fiber connectivity to support mobile network operators. It manages the construction and maintenance of critical infrastructure to enable wireless connectivity and data services. The company focuses on engineering excellence to ensure network reliability and performance.
- Dec 2017Conventional Debt$231M
- 2014PE$20M
- Mar 2014PE$420M
- 2013PE$5M
#7
Acquired · London, England · founded 2018 · 635 employees$135.8Mraised▾
Provider of full fibre broadband services. This company operates a network that delivers high speed internet connectivity directly to residential and business premises. The service utilizes fibre optic technology to provide data transmission for streaming, gaming, and professional tasks. Customers receive hardware for wireless connectivity and support for managing their internet connections.
- Oct 2021Conventional Debt$135.8M
#8
Public · London, England · founded 2006 · 548 employees$630Mraised▾
Operator of mobile tower infrastructure. This business provides mission-critical towers and energy solutions to support telecommunications connectivity. It manages independent tower platforms to facilitate mobile network operations.
- Jul 2014Series D$630M
- Feb 2010Series A—
- Oct 2007Series A—
#9
Acquired · London, England · founded 2005 · 50 employees$34Mraised▾
Provider of phone number data and intelligent communication solutions. It offers services for voice and messaging routing, fraud protection, and identity and verification. These solutions leverage data to improve communication delivery, enabling accurate routing and preventing fraudulent activities. The company provides services such as global number range data, mobile number portability lookup, and home location register lookup, helping businesses manage and validate phone numbers effectively. Its managed services streamline data management for clients.
- Jun 2013PE$10M
- Sep 2009Series B$10M
- Apr 2007Series A$12M
- Sep 2005Seed$2M
#10
Acquired · London, England · founded 2001 · 35 employees$14Mraised▾
Provider of refurbished network hardware and networking advice. This company offers refurbished network equipment, such as switches and routers, from reputable brands. They also provide guidance on improving Wi-Fi performance, including advice on router placement, frequency selection, and the use of Wi-Fi repeaters. Additionally, they offer information on VoIP services and the differences between switches and routers. The company emphasizes environmentally friendly practices through the reuse of network hardware.
- Feb 2008Series B$12M
- Jan 2005Series B$2M
#11
Funding Raised · London, England · founded 2007 · 9 employees$7.7Mraised▾
Provider of voice, SMS, and call center exchange services
- May 2017Venture Debt$7.7M
#12
Funding Raised · London, England · founded 2014 · 4 employees$3.9Mraised▾
Provider of excavation, utilities, and earthworks services. This includes the construction of water, sewer, stormwater, and drainage systems. They also install septic tanks, bio-treatment plants, and fire suppression water reservoirs. Additional services encompass the construction and renovation of in-building water and sewer lines, water meter assemblies, and well and pump house installations. Earthworks services include site preparation, foundation excavation, backfilling, and compaction; road and plaza construction; diamond core drilling; and topsoil sales and grading. They also handle demolition and disposal, snow removal, and the construction and maintenance of drainage ditches and ponds. Equipment rental is also offered.
- Oct 2018Grant (prize money)$1.9M
- Nov 2016Grant (prize money)$2M
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Telecom Infrastructure coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
Common questions
Riya reads income statements for fun. She covers the real money in a sector — revenue, growth, who actually earns — and never met a vague claim she didn't want a number for.